555431081 has 2 divisors, whose sum is σ = 555431082. Its totient is φ = 555431080.

The previous prime is 555431077. The next prime is 555431099. The reversal of 555431081 is 180134555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 508096681 + 47334400 = 22541^2 + 6880^2 .

It is a cyclic number.

It is not a de Polignac number, because 555431081 - 2² = 555431077 is a prime.

It is a super-2 number, since 2×555431081² = 617007371481657122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (555431011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277715540 + 277715541.

It is an arithmetic number, because the mean of its divisors is an integer number (277715541).

Almost surely, 2^555431081 is an apocalyptic number.

It is an amenable number.

555431081 is a deficient number, since it is larger than the sum of its proper divisors (1).

555431081 is an equidigital number, since it uses as much as digits as its factorization.

555431081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 555431081 is about 23567.5853875615. The cubic root of 555431081 is about 822.0092907272.

The spelling of 555431081 in words is "five hundred fifty-five million, four hundred thirty-one thousand, eighty-one".